Good question.

I blindly followed @dmose suggestion to do something when we do not have any username available.
It's hard to say if this case will happen, however concerning displaying the `LinkShareView` or not, it may change in the future as the username could be irrelevant (because the user could be not logged in).

So for now, except if we want to investigate `#isLoggedIn` I would suggest to let that as is.